Microfiber-Enabled In-line Fabry-Perot Interferometer for High-Sensitive Force and Refractive Index Sensing
Microfiber-Enabled In-line Fabry-Perot Interferometer for High-Sensitive Force and Refractive Index Sensing
复制标题
用于高灵敏度力和折射率传感的微光纤在线法布里-珀罗干涉仪
DOI：
10.1109/jlt.2014.2310205
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发表时间：
2014-05-01
影响因子：
4.7
通讯作者：
Li, Jieliang
中科院分区：
文献类型：
--
作者：
Gao, Shecheng;Zhang, Weigang;Li, Jieliang
提出了一种基于微光纤的法布里-珀罗干涉仪（FPI），该干涉仪由两个具有独特相对光纤截面关系的标准单模光纤（SMF）拼接而成。由微光纤连接的两个SMF端之间的开放空气腔用作FP腔，也用作直接传感头。研究了不同腔长和微纤直径的光纤偏振干涉器的传感特性。通过使用基于微纤维的FPI，具有类似于21 μ m的腔长和类似于44 μ m的微纤维直径，已经实现了高达167.41nm/N（类似于200 μ m/μ m）的力灵敏度和1330.8nm/RIU（约为1.33的RI）的高折射率（RI）灵敏度。这种器件具有结构简单、体积小、热交叉灵敏度低、工作可靠等优点。
A microfiber-enabled Fabry-Perot interferometer (FPI) constructed by splicing a section of microfiber between two cleaved standard single-mode fibers (SMFs) with unique relative fiber cross section relationship has been proposed and experimentally demonstrated. The opening air cavity between the two SMF ends connected by the microfiber serves as an FP cavity and also a direct sensing head. The sensing characteristics of the FPIs with different cavity lengths and microfiber diameters have been studied. A force sensitivity as high as 167.41 nm/N (similar to 200 pm/mu epsilon) and a high refractive index (RI) sensitivity of 1330.8 nm/RIU (around a RI of 1.33) have been achieved by using the microfiber-based FPI with similar to 21 mu m cavity length and similar to 44 mu m microfiber diameter. Such a device has several merits such as simple configuration, compactness and reliability in operation owing to the extremely low thermal cross-sensitivities.